Preparation of barium hexaferrite coatings using atmospheric plasma spraying

Darja Lisjak (Corresponding Author), Kirsten Bobzin, Katharina Richardt, Marion Bégard, Giovanni Bolelli, Luca Lusvarghi, Arto Hujanen, Pertti Lintunen, Massimo Pasquale, Elena Olivetti, Miha Drofenik, Thomas Schläfer

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    Abstract

    Thick coatings of barium hexaferrite with the compositions BaFe12O19 and BaCoTiFe10O19 were prepared using atmospheric plasma spraying (APS) technology. The coatings were prepared from pre-reacted powders of the desired composition. The as-deposited coatings were poorly crystallized, but their crystallinity was improved with a subsequent annealing. The crystallization mechanism of the sprayed hexaferrites was studied during annealing up to 1300 °C, using X-ray powder diffraction combined with thermal analysis and with electron microscopy including microanalysis. Single-phase coatings were obtained after annealing treatments at 1100–1300 °C. Their magnetic properties showed that they would be suitable for absorbers at microwave and mm-wave frequencies, depending on the coating phase's composition, the crystallinity and the thicknesses.
    Original languageEnglish
    Pages (from-to)2333-2341
    Number of pages9
    JournalJournal of the European Ceramic Society
    Volume29
    Issue number11
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • Ferrites
    • thermal spraying
    • solid-state reaction
    • magnetic properties
    • dielectric properties

    Cite this

    Lisjak, D., Bobzin, K., Richardt, K., Bégard, M., Bolelli, G., Lusvarghi, L., Hujanen, A., Lintunen, P., Pasquale, M., Olivetti, E., Drofenik, M., & Schläfer, T. (2009). Preparation of barium hexaferrite coatings using atmospheric plasma spraying. Journal of the European Ceramic Society, 29(11), 2333-2341. https://doi.org/10.1016/j.jeurceramsoc.2009.01.028